How many movies have Mitsu Dan and Naoki Youyama collaborated on?

They have worked on 7 movies together! Their first movie together was Honto ni Atta Shinrei Shashin: Noroi (2011) and was their highest rated movie together. They have not worked together since Honto ni Atta Shinrei Shashin: The Best (2019). They are most known for their horror films together.